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REGRID_CUDEM_ROMS_BATHY_TEST.py
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REGRID_CUDEM_ROMS_BATHY_TEST.py
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"""
REGRID_CUDEM_ROMS_BATHY
Download CUDEM data from http site and regrid to a given ROMS grid.
usage:
1) edit relevant variables in the section labeled below.*
2) execute file using something like:
% conda activate "RELEVANT_EVIRONEMENT"
% python REGRID_CUDEM_BATHY.py
*- see README
Created by Elias Hunter, [email protected], 1/13/2023
"""
#Import Necessary Modules
import xarray as xr
import numpy as np
import requests
import time,os,shutil
import rioxarray
from shapely import geometry
import cartopy.io.shapereader as shpreader
import netCDF4
import xesmf as xe
import zipfile
########################################################################
#EDIT BETWEEN HERE
########################################################################
# INPUT GRID FILE
#gfile=r'/home/hunter/roms/NOPP/DEM/SANIBEL_ROMS_FORECAST_11R_JUN2021_MAX3.nc'
# Output GRID FILE
#newgfile=r'/home/hunter/roms/NOPP/DEM/SANIBEL_ROMS_FORECAST_11R_JUN2021_MAX3_CUDEM.nc'
# INPUT GRID FILE
gfile=r'/home/hunter/roms/NOPP/grids/michael_grd3.nc'
# Output GRID FILE
newgfile=r'//home/hunter/roms/NOPP/grids/michael_grd3_CUDEM.nc'
"""
1) Download and uzip the shapefiles contained the DEM tile footprints. The 9th arc-sec shape file is at
https://coast.noaa.gov/htdata/raster2/elevation/NCEI_ninth_Topobathy_2014_8483/ in
https://coast.noaa.gov/htdata/raster2/elevation/NCEI_ninth_Topobathy_2014_8483/tileindex_NCEI_ninth_Topobathy_2014.zip.
The 3rd arc-sec shape file is at
https://coast.noaa.gov/htdata/raster2/elevation/NCEI_third_Topobathy_2014_8580/ in
https://coast.noaa.gov/htdata/raster2/elevation/NCEI_ninth_Topobathy_2014_8483/tileindex_NCEI_ninth_Topobathy_2014.zip. Download and unzip both of these files, note the location.
import zipfile
r = requests.get(url)
with open('test.zip','wb') as f:
f.write(r.content)
with zipfile.ZipFile(r'./test.zip', 'r') as zip_ref:
zip_ref.extractall(r'./')
"""
# Shape file locations for CUDEM tiles.
shpfile_9_url=r'https://coast.noaa.gov/htdata/raster2/elevation/NCEI_ninth_Topobathy_2014_8483/tileindex_NCEI_ninth_Topobathy_2014.zip'
shpfile_9_dir=r'/home/hunter/roms/NOPP/DEM/tileindex_NCEI_ninth_Topobathy_2014/'
shpfile_9=shpfile_9_dir+r'tileindex_NCEI_ninth_Topobathy_2014.shp'
datadir_9=r'/home/hunter/roms/NOPP/DEM/ncei_nintharcsec_dem_data/'
urlprefix_9=r'https://chs.coast.noaa.gov/htdata/raster2/elevation/NCEI_ninth_Topobathy_2014_8483/'
shpfile_3_url=r'https://coast.noaa.gov/htdata/raster2/elevation/NCEI_third_Topobathy_2014_8580/tileindex_NCEI_third_Topobathy_2014.zip'
shpfile_3_dir=r'/home/hunter/roms/NOPP/DEM/tileindex_NCEI_third_Topobathy_2014/'
shpfile_3=shpfile_3_dir+r'tileindex_NCEI_third_Topobathy_2014.shp'
datadir_3=r'/home/hunter/roms/NOPP/DEM/ncei_thirdarcsec_dem_data/'
urlprefix_3=r'https://coast.noaa.gov/htdata/raster2/elevation/NCEI_third_Topobathy_2014_8580/'
#set a depth cutoff, positive down.
depthcut=-3.0
# set a datum adjustment to correct CUDEM data.
datum_adjust=0.0
TMPZIP=r'tmp.zip'
########################################################################
#AND HERE
########################################################################
#Download and extract shapefiles.
print('Getting and Extracting 9th arc-sec tile shapefile')
r = requests.get(shpfile_9_url)
if r.status_code==404:
print('FILE NOT FOUND: ' + shpfile_9_url)
with open(shpfile_9_dir+TMPZIP,'wb') as f:
f.write(r.content)
with zipfile.ZipFile(shpfile_9_dir+TMPZIP, 'r') as zip_ref:
zip_ref.extractall(shpfile_9_dir)
print('Getting and Extracting 3rd arc-sec tile shapefile')
r = requests.get(shpfile_3_url)
if r.status_code==404:
print('FILE NOT FOUND: ' + shpfile_3_url)
with open(shpfile_3_dir+TMPZIP,'wb') as f:
f.write(r.content)
with zipfile.ZipFile(shpfile_3_dir+TMPZIP, 'r') as zip_ref:
zip_ref.extractall(shpfile_3_dir)
#Extract Grid Information
grd = xr.open_dataset(gfile,chunks={'eta_rho':900,'xi_rho':600})
grd=grd.set_coords(('lat_rho','lon_rho'))
grdH=grd.h.load()
grdH = grdH.rename({"lon_rho": "lon", "lat_rho": "lat"})
glon=np.concatenate((grdH.lon[0,:].values,grdH.lon[:,-1].values,np.flip(grdH.lon[-1,:].values),np.flip(grdH.lon[:,0].values)))
glat=np.concatenate((grdH.lat[0,:].values,grdH.lat[:,-1].values,np.flip(grdH.lat[-1,:].values),np.flip(grdH.lat[:,0].values)))
llbounds=d = np.column_stack((glon,glat))
#Create new grid file
shutil.copy(gfile,newgfile)
# Get CUDEM 9th arc-sec data from coast.noaa.gov
#Identify files that overlap the ROMS grid and download them.
BBOX=geometry.Polygon(llbounds)
a=shpreader.Reader(shpfile_9)
b=a.records()
GLIST9=[]
flist9=[]
for c in b:
tgeom=c.geometry
if tgeom.intersects(BBOX):
GLIST9.append(tgeom)
location=c.attributes['location']
tmp=location.split('/')
image_url=urlprefix_9+location
print(image_url)
outfile=datadir_9+tmp[-1]
flist9.append(outfile)
if os.path.exists(flist9[-1]):
print('FILE EXISTS SKIPPING:'+outfile)
continue
print('Getting:'+image_url)
r = requests.get(image_url)
if r.status_code==404:
print('FILE NOT FOUND: ' + image_url)
print('Writing:'+tmp[-1])
with open(outfile,'wb') as f:
f.write(r.content)
elements9 = []
for file in flist9:
print(file)
tmp=rioxarray.open_rasterio(file)
tmp=tmp.squeeze()
elements9.append(tmp)
if not elements9:
print("NO overlapping CUDEM 9th arc-sec files")
# Get CUDEM 3th arc-sec data from coast.noaa.gov
#Identify files that overlap the ROMS grid and download them.
BBOX=geometry.Polygon(llbounds)
a=shpreader.Reader(shpfile_3)
b=a.records()
GLIST3=[]
flist3=[]
for c in b:
tgeom=c.geometry
# print(tgeom)
# print(c.attributes['location'])
if tgeom.intersects(BBOX):
GLIST3.append(tgeom)
location=c.attributes['location']
# print(location)
# flist.append(location)
tmp=location.split('/')
image_url=urlprefix_3+location
print(image_url)
outfile=datadir_3+tmp[-1]
flist3.append(outfile)
if os.path.exists(flist3[-1]):
print('FILE EXISTS SKIPPING:'+outfile)
continue
print('Getting:'+image_url)
r = requests.get(image_url)
if r.status_code==404:
print('FILE NOT FOUND: ' + image_url)
print('Writing:'+tmp[-1])
with open(outfile,'wb') as f:
f.write(r.content)
elements3 = []
for file in flist3:
print(file)
tmp=rioxarray.open_rasterio(file)
tmp=tmp.squeeze()
elements3.append(tmp)
if not elements3:
print("NO overlapping CUDEM 3rd arc-sec files")
df=grdH.to_dataframe()
#Regrid the 9th arc sec CUDEM data and overwetie ROMS grid bathymetry
print('starting regridding')
for el in elements9:
# print(el)
st = time.time()
el = el.rename({"x": "lon", "y": "lat"})
mnlon=el.lon.min().values
mxlon=el.lon.max().values
mnlat=el.lat.min().values
mxlat=el.lat.max().values
#print([mnlon, mxlon, mnlat, mxlat])
df2=df.loc[(df['lon'] > mnlon) & (df['lon'] < mxlon) & (df['lat'] > mnlat) & (df['lat'] < mxlat)]
print('Regridding 9th arc sec files')
regridder = xe.Regridder(el, df2, "bilinear", locstream_out=True)
y=regridder(el, keep_attrs=True)
df.loc[(df['lon'] > mnlon) & (df['lon'] < mxlon) & (df['lat'] > mnlat) & (df['lat'] < mxlat),'h']=-y+datum_adjust
# get the end time
et = time.time()
# get the execution time
elapsed_time = et - st
print('Execution time:', elapsed_time, 'seconds')
#Regrid the 3rd arc sec CUDEM data and overwetie ROMS grid bathymetry
for el in elements3:
# print(el)
st = time.time()
el = el.rename({"x": "lon", "y": "lat"})
mnlon=el.lon.min().values
mxlon=el.lon.max().values
mnlat=el.lat.min().values
mxlat=el.lat.max().values
#print([mnlon, mxlon, mnlat, mxlat])
df2=df.loc[(df['lon'] > mnlon) & (df['lon'] < mxlon) & (df['lat'] > mnlat) & (df['lat'] < mxlat)]
print('Regridding 3rd arc sec file')
regridder = xe.Regridder(el, df2, "bilinear", locstream_out=True)
y=regridder(el, keep_attrs=True)
df.loc[(df['lon'] > mnlon) & (df['lon'] < mxlon) & (df['lat'] > mnlat) & (df['lat'] < mxlat),'h']=-y+datum_adjust
# get the end time
et = time.time()
# get the execution time
elapsed_time = et - st
print('Execution time:', elapsed_time, 'seconds')
#Reshape gridded data
newH=df.to_xarray()
newH=newH.set_coords(('lat','lon'))
#Adjustmenst to bathymetry to accound for
tmpH=newH['h'].values
tmpH[tmpH<depthcut]=depthcut
#wrtiting data put.
nc = netCDF4.Dataset(newgfile, "r+", format="NETCDF4")
h=nc['h']
h[:,:]=tmpH
nc.close()
print("REGRIDING FINISHED")